Riello MULTI SENTRY MST 125

Questions and Answers

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Christine FloresDec 1, 2025
What do error codes F34, F35, F36, L34, L35, L36 mean on my Riello UPS?
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  Kurt JonesDec 1, 2025
  If the display of your Riello UPS shows one or more of the codes F34, F35, F36, L34, L35, L36, it could be due to: * Ambient temperature exceeding 40°C * Sources of heat near the UPS * Obstructed ventilation slits or slits too close to walls To resolve this, activate manual bypass (SWMB) without switching off the UPS to allow the fans to cool the dissipator more quickly. Remove the cause of over-temperature and wait for the dissipator temperature to lower before excluding manual bypass. It may also indicate a temperature sensor or UPS cooling system malfunction. In this case, insert manual bypass (SWMB) without switching off the UPS so that fans can cool the dissipator more quickly. Wait for dissipator temperature to lower. Switch off and then re-start the UPS. Exclude manual bypas...
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Kelly McintyreAug 23, 2025
What to do if Riello MULTI SENTRY MST 125 UPS does not go into standby mode with mains power?
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  Carmen EdwardsAug 25, 2025
  If your Riello UPS doesn't enter standby mode despite mains power, check the following: * Ensure the mains are correctly connected to the input terminals as per the installation instructions. * Verify the neutral connection is present, as the UPS requires it to operate. Failure to connect the neutral can damage the UPS or the load. * Confirm the switch behind the door (SWIN) is closed. * Check for a blackout; verify the presence of mains voltage. If there is no mains voltage, switch on via batteries to power the load. * Check for upstream protection intervention and reset the protection, ensuring there is no output overload or short to the UPS.
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Erica HernandezAug 25, 2025
What to do if there is no load voltage arriving from my Riello UPS?
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  Elizabeth ThomasAug 26, 2025
  If there is no load voltage from your Riello UPS, consider these possibilities: 1. Check that the load is properly connected to the output terminals. 2. Ensure that the switch behind the door (SWOUT) is closed. 3. Verify that the UPS is not in standby mode. If it is, perform the startup sequence. 4. Confirm that the Stand-by OFF mode is not selected, as this mode only powers loads during blackouts. 5. If the UPS has malfunctioned and the automatic bypass isn't working, insert the manual bypass (SWMB) and contact the nearest service center.
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Ashley EllisAug 27, 2025
What does it mean when my Riello MULTI SENTRY MST 125 shows codes A39, A40 and the replace batteries LED is on?
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  Jennifer RossAug 27, 2025
  If your Riello UPS displays codes A39 or A40 and the red "Replace Batteries" LED is on, it means the batteries haven't passed their periodic efficiency test. It's recommended to replace the batteries, as they may no longer provide sufficient autonomy. Battery replacement must be performed by qualified personnel.
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george47Aug 27, 2025
What does code S07 mean on my Riello UPS?
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  Michelle RussellAug 27, 2025
  If your Riello UPS displays code S07, it indicates that the batteries are flat and the UPS is waiting for the battery voltage to exceed the set threshold. You can either wait for the batteries to recharge or manually force power-on via the “ON” menu.
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Tanya HooperSep 16, 2025
What do error codes L01, L10, L38, L39, L40, L41 mean on my Riello MULTI SENTRY MST 125 UPS?
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  Terrence MatthewsSep 16, 2025
  If your Riello UPS displays one or more of the following codes: L01, L10, L38, L39, L40, L41, it indicates a malfunction of the temperature sensor, UPS cooling system, main auxiliary power, or static bypass switch. To resolve this, activate manual bypass (SWMB), switch off and re-start the UPS. Exclude manual bypass Contact the nearest service centre if this problem persists.
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Elizabeth MasonSep 14, 2025
What do error codes L11, L12, and L13 mean on my Riello MULTI SENTRY MST 125?
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  Robert MonroeSep 14, 2025
  If your Riello UPS displays codes L11, L12, or L13, it indicates a static bypass breakage or malfunction. To address this, activate manual bypass (SWMB), switch off the UPS, wait one minute, and then re-start the UPS. Exclude manual bypass. Contact the nearest service centre if this problem persists.
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Steven RiddleSep 15, 2025
What do error codes F06, F07, F08 mean on my Riello MULTI SENTRY MST 125 UPS?
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  lparkerSep 15, 2025
  If your Riello UPS displays one or more of the following codes: F06, F07, F08, it indicates that the input contactor is blocked. To resolve this, activate manual bypass (SWMB), switch off the UPS, open the SWIN and contact the nearest service centre (Attention: once the SWIN is open, it will no longer be possible to close it again before Service intervenes).
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Dean JohnsonSep 6, 2025
Why won't my Riello MULTI SENTRY MST 125 UPS start up and shows codes A30, A32, A33, A34?
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  Mitchell BridgesSep 6, 2025
  If your Riello UPS displays codes A30, A32, A33, A34 and won't start, it could be due to the ambient temperature being below 0°C. Heat up the room, wait for the dissipater temperature to exceed 0°C, and then start up the UPS. Alternatively, there may be a temperature sensor malfunction on the dissipator. In this case, activate manual bypass (SWMB), switch off the UPS, re-start the UPS and exclude manual bypass. Call the nearest service centre if this problem persists.
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Thomas BlankenshipSep 4, 2025
What do error codes F11, F14, F15, F16, F17, L06, L07, L08, L09, L14, L15, L16, L17, L18, L19, L20, L21, L22 mean on my Riello MULTI SENTRY MST 125 UPS?
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  qclarkSep 4, 2025
  If your Riello UPS shows one or more of the following codes: F11, F14, F15, F16, F17, L06, L07, L08, L09, L14, L15, L16, L17, L18, L19, L20, L21, L22, it may be due to the insertion of abnormal loads. Remove the load. Insert manual bypass (SWMB), switch off and re-start the UPS. Exclude manual bypass Call the nearest service centre if this problem persists. Another possibility is a UPS input or output stage malfunction. Activate manual bypass (SWMB), switch off and re-start the UPS. Exclude manual bypass Contact the nearest service centre if this problem persists.

Summary

PRESENTATION

COMMUNICATIONS AREA VIEW

SWITCHES VIEW

CONTROL PANEL VIEW

Control Panel Layout and Indicators

Explains the display, LEDs, and function keys of the control panel.

UPS CONNECTIONS VIEW

SEPARATE BYPASS INPUT (OPTIONAL FOR MST 60-80-100)

INSTALLATION

INSTALLATION SET-UP

Provides initial setup instructions and warnings for qualified personnel.

REMOVING THE UPS FROM THE PALLET

Unpacking and Removal Instructions

Step-by-step instructions for safely removing the UPS from its packaging.

ELECTRICAL CONNECTIONS

CONNECTION CABLES SECTION

Table detailing required cable cross-sections for power connections.

PRELIMINARY OPERATIONS FOR CONNECTION

Pre-Connection Safety Checks

Essential checks and safety precautions before making electrical connections.

HOOKUP INSTRUCTIONS

Electrical Connection Steps

Step-by-step guide for connecting power cables to the UPS.

ELECTRICAL SYSTEM CONNECTION DIAGRAMS

UPS with Separate Bypass Input

Separate Bypass on Separate Lines

PROTECTION DEVICES

INPUT LINE THERMAL MAGNETIC SWITCHES

Recommendations for external AC input protection devices.

BATTERY LINE PROTECTION

Guidance on surge protectors and fuses for the battery line.

DIFFERENTIAL

OUTPUT LINE FUSES;THERMAL MAGNETIC SWITCHES

REMOTE MAINTENANCE BYPASS

Maintenance Bypass Installation Diagram

Diagram illustrating the installation of a maintenance bypass.

USE

FIRST START-UP AND ADDITIONAL SETTINGS

Initial Setup and Configuration Steps

Step-by-step guide for the initial power-on and configuration.

SWITCHING ON FROM THE MAINS

SWITCHING ON FROM THE BATTERY

Procedure for starting the UPS using battery power.

SHUTDOWN PROCEDURE

Instructions for safely shutting down the UPS.

GRAPHIC DISPLAY

DISPLAY MENU

OPERATING MODE

MANUAL BYPASS (SWMB)

Instructions for operating the manual bypass switch.

UPS CONFIGURATION

Configurable Parameters

Lists configurable parameters via control panel and software.

COMMUNICATION PORTS

ACOUSTIC SIGNAL (BUZZER)

SOFTWARE

MONITORING AND CONTROL SOFTWARE

Details the PowerShield³ software for UPS management.

CONFIGURATION SOFTWARE

Mentions software for advanced UPS parameter configuration.

TROUBLESHOOTING

Common Problem Solutions

Provides solutions for common UPS operational problems.

STATUS; ALARM CODES

UPS Status Codes

Lists codes for different UPS operating statuses.

ANOMALY CODES

Minor Problem Codes

FAULT CODES

Critical Problem Codes

Lists codes for critical problems that can cause UPS malfunction.

LOCK CODES

UPS Inhibition Codes

Lists codes indicating UPS inhibition due to failure or alarm.

TECHNICAL DATA

Input Stage Specifications

Output Stage Specifications

MODE AND EFFICIENCY